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B20B4 vs. B20B - What's the difference??

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Old May 5, 2010 | 05:41 PM
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TurboGoKart's Avatar
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Default B20B4 vs. B20B - What's the difference??

My buddy brought me his CRV w/B20B4 in it. He has low mileage B20B that he wanted me to put in it. I noticed some of the pieces are different (one off the bat is the A/C bracket - no biggie). But looking further I noticed the B20B4 has a crank angle sensor, but the B20B doesn't. If I'm correct, these both came from the 97-98 CRV. So what's the difference b/w the two? Can I still put the B20B in the CRV? Thanks!
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Old May 5, 2010 | 05:54 PM
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Default Re: B20B4 vs. B20B - What's the difference??

I love my friends lol.

To make it work, you either need to use an older CRV ECU (still have the possibility of a CEL, but it'll run fine), or swap the B20B4 oil pump (so that you can retain the crank angle sensor) over to the B20B.
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Old May 5, 2010 | 06:07 PM
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Default Re: B20B4 vs. B20B - What's the difference??

Do I in fact have to swap the oil pump to keep the crank angle sensor? I haven't taken off the crank pulley yet to see.
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Old May 6, 2010 | 05:37 AM
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Default Re: B20B4 vs. B20B - What's the difference??

yes you have to swap the oil pump to do it correctly .
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Old May 6, 2010 | 06:16 AM
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Default Re: B20B4 vs. B20B - What's the difference??

there also is a crank angle sensor bypass you can do at the ecu.
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Old May 6, 2010 | 04:03 PM
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Default Re: B20B4 vs. B20B - What's the difference??

Will that make you throw any codes? The bypass that is. I just want to make sure the motor will run right.
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Old May 6, 2010 | 06:15 PM
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Default Re: B20B4 vs. B20B - What's the difference??

i recently did a jdm b20b in my crv with the bypass and no problems... even passed emissions without NO PROBLEMS!!! runs great
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Old May 6, 2010 | 06:36 PM
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Default Re: B20B4 vs. B20B - What's the difference??

Hmm...I'm definitely interested now. Any one have a link to this bypass?
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Old May 6, 2010 | 06:44 PM
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Default Re: B20B4 vs. B20B - What's the difference??

Yeah, here ya go...

http://ff-squad.com/wp/?p=309


FFSquad FTW!
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Old May 6, 2013 | 06:24 AM
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Default Re: B20B4 vs. B20B - What's the difference??

hey, doing the exact same job on my 98 crv just wondering how everything turned out and if you swapped the oil pump or just did the bypass and what the results were any help would be appreciated thx
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Old May 6, 2013 | 07:42 AM
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Default Re: B20B4 vs. B20B - What's the difference??

It all depends on what kind of emissions inspection they do in your area. If they do a visual check to see that all emissions components are in place, you'll fail without a crank angle sensor. Most shops don't care enough to do a full visual inspection, so they would never know if you have the sensor or not. If you're not in an area with strict inspections or don't have to pass one at all then just do the bypass at the ecu.
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Old May 10, 2013 | 03:33 PM
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Default Re: B20B4 vs. B20B - What's the difference??

just an update swapped oil pumps perfect no cel
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Old Apr 6, 2017 | 03:34 PM
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Default Re: B20B4 vs. B20B - What's the difference??

Hi, I got a b20b the car starts but wont rev I need help please
​​​​​​
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Old Jan 24, 2025 | 02:07 PM
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Default Re: B20B4 vs. B20B - What's the difference??

Originally Posted by TurboGoKart
I love my friends lol.

To make it work, you either need to use an older CRV ECU (still have the possibility of a CEL, but it'll run fine), or swap the B20B4 oil pump (so that you can retain the crank angle sensor) over to the B20B.
Hey so can I replace a b20b4 w a b20b bc my eg needs a new motor and I got a b20b4 instead so I wanna know what I need to replace to run it. It currently has a b20b w a s80 trans..I wanna run b20b4 w the same trans if possible lmk asap please
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